Athlon 64 X2 3800+ vs Pentium D 945

General info

Comparing Pentium D 945 and Athlon 64 X2 3800+ processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Architecture codename	Presler (2006−2007)	Manchester (2005−2006)
Release date	23 July 2006 (17 years ago)	August 2005 (18 years ago)
Current price	$71	$86

Technical specs

Pentium D 945 and Athlon 64 X2 3800+ basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	2 (Dual-core)	2 (Dual-core)
Threads	2	2
Base clock speed	3.4 GHz	no data
Boost clock speed	3.4 GHz	2 GHz
L1 cache	16 KB (per core)	256K
L2 cache	2 MB (per die)	512 KB
L3 cache	0 KB	0 KB
Chip lithography	65 nm	90 nm
Die size	2x 81 mm2	220 mm2
Maximum core temperature	63 °C	no data
Maximum case temperature (TCase)	63 °C	no data
Number of transistors	376 million	154 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No
VID voltage range	1.2V-1.3375V	no data

Compatibility

Information on Pentium D 945 and Athlon 64 X2 3800+ compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1	1
Socket	LGA775,PLGA775	939
Power consumption (TDP)	95 Watt	89 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium D 945 and Athlon 64 X2 3800+. You'll probably need this information if you require some particular technology.

AES-NI	-	no data
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
Idle States	+	no data
Thermal Monitoring	-	no data
Demand Based Switching	-	no data
PAE	32 Bit	no data
FSB parity	-	no data
Status	Discontinued	no data

Security technologies

Pentium D 945 and Athlon 64 X2 3800+ technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium D 945 and Athlon 64 X2 3800+ are enumerated here.

VT-d	-	no data
VT-x	-	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium D 945 and Athlon 64 X2 3800+. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, DDR3	no data
ECC memory support	-	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

no data

Advantages and disadvantages

---

Chip lithography	65 nm	90 nm
Power consumption (TDP)	95 Watt	89 Watt

---

Should you still have questions on choice between Pentium D 945 and Athlon 64 X2 3800+, ask them in Comments section, and we shall answer.

Vote

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

---